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Instead of find_exec, without changing behaviour use new pathfinder class with new allocator_interface around tmp_pathbuf and new vstrlist class. * pathfinder.h (pathfinder): New file. * vstrlist.h (allocator_interface, allocated_type, vstrlist): New file. * dlfcn.cc (dlopen): Avoid redundant GetModuleHandleExW with RTLD_NOLOAD and RTLD_NODELETE. Switch to new pathfinder class, using (tmp_pathbuf_allocator): New class. (get_full_path_of_dll): Drop.
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